3M Peltor Comtac III Arc Rail Adapters Installation - YouTube
Tactical helmet OPS CORE rail ARC track adapter COMTAC bracket for Peltor COMTAC I II III series noise reduction headphones BK|Intercom Accessories| - AliExpress
EARMOR Tactical Headset ARC Helmet Rails Adapter for 3M Peltor Comtac Headset – EARMOR STORE